这个报的空指针错误，应该是GameManager.Instance为空，检查一下GameManager里面Instance怎么赋值的

   private static GameManager _instance;
    public static GameManager Instance
    {
        get { return _instance; }
    }
    private BoxCollider2D rightWall;
    private BoxCollider2D leftWall;
    private BoxCollider2D downWall;
    private BoxCollider2D upWall;
    public Transform Player1;
    public Transform Player2;
   
    private int score1;
    private int score2;
    public Text score1Text;
    public Text score2Text;

    void Aawke()
    {
        _instance = this;
    }

呃 我找到了 Aawke写错了应该是Awake，不知道这是什么意思。。不理解